I have bought each title of the series as it came out, and they are in two different sizes and two and a half different spine designs. I am not a compulsively neat arranger of books, but a little consistency across a series is nice.

I wouldn´t have guessed the American one was a modern novel at all. It looks like a boring school book from the 70s. The UK cover is much better, and I like the sepia colours which suggest a photo from that time.

I'm tempted to say neither as well. The US one is simply grim without telling anything about the story and could indeed be a non-fiction book. The UK one does the job though it hints at more romance than mystery/espionage. Love these cover posts, though.

Usually I like the UK cover better, but it conveys romance to me, with huge, intact buildings in the background, and a plane flying overhead, for an unknown reason.

The US cover more shows the destruction of war, which is a reflection of reality. However, it is so gray and the scene is in so much ruin, that it isn't a compelling cover, but a depressing one. War is depressing, true.